I second that wholeheartedly. It's never about "Have you read ALL these books?" or "How can you even think you can read all these books in your lifetime?" That shows that people don't understand what libraries (or vast book collections) are for (or: about): That, at least in priciple, you can go to the shelves and look up a book or a sequence in that book, whenever necessary or whenever its time has come. It's about preserving possibilities, not reducing or decreasing them (by counting down the books left to read). You never read all books in your book collection and then stop -- because you don't want your mind to be finite, but, if possible, infinite.